Smoke-consumer for furnaces



(No Model.)

2 Sheets-Sheet 1.

-J. DONOVAN. SMOKE CONSUMER FOR PURNAGES.

Nolszeozv.

Patented Oct. 2'7, 1885.

WTQESSEB (No Model.) 2 Sheets-Sheet 2.

I J. DONOVAN.

SMOKE CONSUMER FOR PURNAUES.

No. 329,027. Patented Oct. 2'7, 1885. T1 3 EHI' llNTTan STATES PATENT Grates.

JOHN DONOVAN, or BosroN, MAssAoHUsn'rrs.

SMOKE-CONSUMER FOR FURNACES.

SPECIFICATION forming part of Letters Patent 310329327, iated October 27, 1885.

Application filed November 17, 1884. Serial No. 148,074. (No model.)

To all whom it may concern:

Be it known that I, JOHN DONOVAN, a citizen of the United States, residing at Boston, (Somerville,) in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in SmokeOonsumers for Furnaces; and I do hereby declare that the same are fully described in the following specification, and illustrated in the accompanying drawings.

This invention relates to improvements in smoke-consumers for furnaces; and it is carried out as follows, reference being had to the accompanying drawings, where Figure 1 represents a central longitudinal section of a furnace provided with my improvement. Fig. 2 represents a horizontal section on the line A B shown in Fig. 1.) Fig. 3 represents a sectional side elevation of my improved smokeconsumer, and Fig. 4 represents a horizontal section thereof on the line C D shown in Fig. 3.

Similar letters referto similar parts wherever they occur on the different parts of the drawings.

In Figs. 1 and 2 the invention is shown as applied to a glass-blowing furnace; but the invention may equally well be used for any other kind of furnace where it is desired to consume the smoke and to produce a thorough combustion of the gases coming from the burning fuel, and thereby to save a great amount of fuel that otherwise would pass up through the chimney as unconsumed smoke and gases, and also to increase the heat within the furnace or fire-place.

In Figs. 1 and 2,60 represents the eye or fire-pot of the furnace,in which b is the crown or arch. c is the grate; d, the ash-pit; e, the chimney; ff, the openings through which the fuel is fed into the furnace, and g g the draftopenings leading to the ash-pit below the grate in the usual manner. it hare the walls or brick-work that inclose the furnace in the ordinary way.

At a suitable distance above the grate c, I locate the hollow ring K, which is made of burnt clay, fire-brick, or other suitable heatresisting material, and in one piece with it is made the hollow arched pipe K, as shown.

is an annular passage in the ring K, and k is the semicircular or curved passage in the arched pipe K, such passages forming together a continuous passage through ring K and arch K, as shown. The interior of ring K.is provided with a number of perforations,

k 76, leading from the annular passage 70 through the inner wall of ring K. The arched pipe K is provided with one or more perforations, 7c, leading from the arched passage is through the inner wall of arched pipe K.

Centrally within the ring K is located one or more hollow tapering tubes or conical projections, K K, provided with side and top perforations, 70 If, such projections K being closed at the bottom and connected to the ring K and its passage It by means of the hollow pipes k 70 To further strengthen and secure the hollow central project-ions, K, to the ring K, I unite such parts together by means of the solid stays k is, all of the said parts of the consumer being made in one single piece of the material or materials, as hereinbefore described.

In one piece with the ring K are made the downwardlyprojecting hollow pipes K K the upper ends of which communicate with the annular passage 76 in the ring K, and the lower ends of which are made to rest on the grate c and project through perforations in the latter, and connected below the said grate to the air-inlet pipes Z 1, that extend within the ash-pit d, as shown in Fig. 1, to permit the heated fresh air from the ash-pit to pass up through said pipes Z l, and thence into the improved smoke-consumer and out through its various perforations k 70* k to meet and intermingle with the unconsumed gaseous products of the ignited fuel, and thus create a thorough combustion and increased heat within the furnace.

For the purpose of regulating the amount of air passing up through hollow pipes Z Z, I arrange in proximity to the lower open ends of the latter the valves or dampers m m, which may be operated by means of rods m m, extending through the walls h h, and provided with handles m m outside of said walls, or in any other suitable or equivalent manner as may be found practical,according to the shape or construction of the furnace.

The operation of this my improved smokeconsumer is as follows: By the draft of the chimney (or by. positive means) the fresh heated air from the ash-pit is drawn up through pipes Z l K K into the hollow ring K, hollow arch K, and hollow conical projections K K, and forced out in opposing directions through the perforations k It 70*", and in so doing the fresh heated air is brought in most intimate contact with the unconsumed products and gases from the burning fuel, causing the said products to be consumed as well as the heat in the furnace to be increased, and thereby savinga great amount of fuel that otherwise would be wasted by passing unconsumed up through the furnace-chimney.

Having thus fully described the nature, construction, andoperation of my invention, I

as and for the purpose set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

JOHN DONOVAN.

Witnesses:

ALBAN ANDREN, HENRY CHADBOURN. 

